CN106850860B - Internet of vehicles information accelerated transmission method, vehicle terminal and base station - Google Patents
Internet of vehicles information accelerated transmission method, vehicle terminal and base station Download PDFInfo
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Abstract
The invention discloses an internet of vehicles information accelerated transmission method, a vehicle terminal and a base station. Wherein, the method comprises the following steps: the vehicle terminal generates burst information; the vehicle terminal generates new resource request information and sends the new resource request information to the base station; the base station processes the new resource request information and allocates new resources for the burst information; and the vehicle terminal sends the burst data packet by adopting new resources, wherein the new resource request information is sent to the base station by the resources pre-allocated to the conventional information. The invention can realize the rapid transmission and reliable transmission of the burst safety information and improve the resource utilization rate.
Description
Technical Field
The invention relates to an accelerated transmission method of Internet of vehicles information, and also relates to a vehicle terminal and a base station for realizing accelerated transmission of the Internet of vehicles information, belonging to the technical field of Internet of vehicles.
Background
The vehicle networking (abbreviated as V2X) includes V2V (vehicle-vehicle communication), V2I (vehicle-road communication), V2P (vehicle-pedestrian communication), and the like, is an integrated network capable of realizing intelligent traffic management, intelligent dynamic information service, and vehicle intelligent control, and is also a typical application of the internet of things technology in the field of traffic systems. Currently, two standards mainly exist in the technical field of V2X communication, namely DSRC (dedicated short range communication technology) and LTE-V2X. The former specifies the communication system architecture of the DSRC protocol and a series of standardized services and interfaces in the IEEE 802.11p and IEEE 1609 standards. LTE-V2X is an LTE enhanced technology and is in the standard research development stage of 3 GPP.
The application scenes of V2X are totally classified into two types, one type is a driving safety type and comprises the scenes of braking of front and rear vehicles, collision avoidance at intersections and the like; the other type is a traffic efficiency improving type, and the traffic efficiency is improved through the prompting of some road speed limits and traffic lights.
The communication requirements of LTE-V2X are shown in table 1, according to the specific type of traffic requirements:
TABLE 1L TE-V2X communication requirements
In the existing LTE-V2X technology, the time delay of active security information propagation is required to be 20-100 ms, and the two types of the time delay are mainly adopted: one is a periodic early warning message such as a cooperative early warning message (CAM) of vehicle type, position, speed, acceleration, etc.; the other is an event-driven warning message (including distributed environment notification information (DENM) such as a road hazard warning), however, the SAE J2735 standard suggests that the transmission delay of high priority vehicle safety information such as collision warning and emergency braking be less than 10 ms.
The V2X message is mostly periodic, and the data transmission frequency is high (e.g. 10Hz), and the service duration is long. In addition, because the topology of the vehicle network changes rapidly due to rapid movement of the vehicle and wireless channel congestion is caused in a congested scene, a more efficient, more reliable and lower-delay resource allocation scheme is required for a V2X bottom layer transmission mechanism, V2X supports adoption of semi-static resource scheduling based on terminal geographic information in base station centralized scheduling, and distributed scheduling adopts a sensing and semi-static scheduling mode, so that resource utilization rate and communication reliability are improved.
The aperiodic message in the V2X message may not satisfy the packet transmission delay requirement because there is no available resource. The existing solutions mainly include two types, one is to use resources in a resource pool to perform selection or reselection to obtain resources in a range without network coverage, and the other is to obtain resources by sending a Scheduling Request (abbreviated as SR) in a range covered by a network. For example, vehicles generate emergency safety information such as emergency hedge while moving. If the current burst information can be judged to have a higher priority based on the priority level indicated by the SCI, the burst information needs to be broadcast immediately. If the network reserves resources for the burst information, the burst information is directly transmitted using the resources, but in an actual network, there may be a case where resources are not reserved particularly for the burst information. If the vehicle terminal is in the coverage range of the base station, the terminal can complete information transmission by requesting the base station to schedule resources. However, if the delay requirement of the burst information is very high, in this case, the scheme of performing resource scheduling by using the scheduling request does not necessarily satisfy the transmission delay of the burst information, and an existing information sending mechanism needs to be improved to further reduce the transmission delay, so as to achieve the purpose of fast transmission of the burst information.
Fig. 1 shows a scheduling procedure under the existing LTE mechanism, and fig. 2 shows the time roughly required by each procedure. As can be seen from the figure, the total time for information transmission based on the scheduling process will reach 17 ms. Fig. 3 shows that in a general case, scheduling requests are uploaded through a PUCCH channel, and a period of a minimum scheduling request is 1ms and a maximum scheduling request is 80 ms. When the V2X network allocates SPS (semi-persistent scheduling) resources to the vehicle terminal, it can be presumed that the setting of the periodic value of the scheduling request will tend to be larger, which will further increase the delay.
In V2X communication, information is generally sent through SPS resources, and under certain conditions, uplink resources are obtained by scheduling based on a scheduling request, and the delay thereof can also meet communication requirements. However, as can be seen from the above analysis, for emergency safety information with a latency less than 10ms as specified by some SAE J2735 standards, the scheduling-based information transmission may not meet such stringent latency requirements.
Disclosure of Invention
The invention aims to solve the primary technical problem of providing an accelerated transmission method of Internet of vehicles information.
Another technical problem to be solved by the present invention is to provide a vehicle terminal for implementing accelerated transmission of internet of vehicles information.
The invention aims to solve the technical problem of providing a base station for realizing accelerated transmission of internet of vehicles information.
In order to achieve the purpose, the invention adopts the following technical scheme:
according to a first aspect of the embodiment of the invention, a vehicle networking information accelerated transmission method is provided, which comprises the following steps:
step 1: the vehicle terminal generates burst information;
step 2: the vehicle terminal generates new resource request information and sends the new resource request information to the base station;
and step 3: the base station processes the new resource request information and allocates new resources for the burst information;
and 4, step 4: the vehicle terminal transmits the burst data packet by using the new resource,
wherein the new resource request information is sent to the base station through a resource pre-allocated to the regular information.
Preferably, the vehicle terminal transmits the burst data packet by using the new resource, and simultaneously transmits the regular information by using the resource pre-allocated to the regular information.
Preferably, the vehicle terminal judges whether a conventional scheduling mechanism meets the time delay requirement, and if so, transmits the burst information in a conventional scheduling mode; and if not, executing the step 2.
Preferably, the vehicle terminal judges whether the new resource meets the time delay requirement, and if the new resource meets the requirement, the new resource is used for transmitting the burst information; and if not, transmitting the burst information by using a conventional scheduling mode.
Preferably, the new resource further includes whether the new resource meets the delay requirement, and whether the new resource has part or all of the burst information and the resource required by the request information.
According to a second aspect of the embodiments of the present invention, a vehicle terminal for implementing accelerated transmission of internet of vehicles information is provided, which generates new resource request information when a new resource can meet a delay requirement, and transmits the new resource request information to a base station through a resource pre-allocated to conventional information; the new resource request information includes a burst information time-frequency resource demand field.
According to a third aspect of the embodiments of the present invention, there is provided a base station for implementing accelerated transmission of car networking information, the base station receiving new resource request information from a vehicle terminal through a resource pre-allocated to conventional information; the base station allocates new resources for the burst information according to the new resource request information; the new resource request information includes a burst information time-frequency resource demand field.
In the technical scheme provided by the invention, the vehicle terminal and the base station negotiate, resources pre-allocated to the conventional information are utilized to request resources for the transmission of the burst information on the premise of meeting the time delay requirement of the burst information, and the burst information and the conventional information are transmitted simultaneously. Therefore, the rapid transmission and the reliable transmission of the burst safety information can be realized, and the resource utilization rate is improved.
Drawings
Fig. 1 is a schematic diagram of a scheduling process of a conventional LTE mechanism;
FIG. 2 is a schematic diagram of the time required for each step in the scheduling process shown in FIG. 1;
fig. 3 is a schematic diagram of uplink transmission delay based on a scheduling request in the scheduling process shown in fig. 1;
FIG. 4 is a schematic diagram of an interaction process between a vehicle terminal and a base station according to the present invention;
FIG. 5 is a schematic view illustrating the operation of the vehicle terminal according to the first embodiment of the present invention;
FIG. 6 is a diagram illustrating a new resource request message sending resource and cycle in a first embodiment of the present invention;
FIG. 7 is a diagram illustrating a comparison between formats of new resource request information and conventional information according to a first embodiment of the present invention;
FIG. 8 is a schematic view of the operation of a vehicle terminal according to a second embodiment of the present invention;
FIG. 9 is a diagram illustrating new resource request message transmission resources and periods according to a second embodiment of the present invention;
fig. 10 is a diagram illustrating a comparison between formats of new resource request information and conventional information according to a second embodiment of the present invention.
Detailed Description
The technical contents of the invention are described in detail below with reference to the accompanying drawings and specific embodiments.
The invention provides a scheme method for quickly transmitting information in V2V and V2X systems based on an LTE or 5G infrastructure network, which is suitable for completing low-delay transmission of emergent information. In the invention, after a vehicle terminal (VUE) generates Burst information (Burst-MSG), if SPS resources of other information are utilized, the vehicle terminal (1) sends Special-MSG information to a base station (eNB), wherein the Special-MSG information carries new resource request information (Special-MSG-A); (2) after receiving the message, the base station processes the Special-MSG information and allocates resources for the burst information according to the own resource information and the new resource request information carried by the Special-MSG. If SPS resources are configured for burst information, a resource configuration process can be realized by configuring a MAC layer Logical Channel Identifier (LCID) and the like; (3) the base station sends an uplink grant to the vehicle terminal and allocates a new SPS resource; (4) and after the VUE receives the uplink grant, the VUE transmits the burst information by adopting the new SPS resource.
In addition, while the vehicle terminal transmits the burst information using the new SPS resource, the original information (e.g., non-burst information) is still transmitted on the original SPS resource in the original manner.
< first embodiment >
As shown in fig. 4, 5, and 6, the specific flow of the vehicle terminal side of the first embodiment is as follows:
step 1: vehicle terminal generating burst information
When a certain vehicle is in an emergency state during the running process of the vehicle, such as a vehicle collision accident. At this time, emergency safety warning information, hereinafter referred to as Burst information (Burst-MSG), is generated at the vehicle terminal. This burst information is assumed to have a higher priority than the regular information (Common-MSG) that has pre-allocated SPS resources.
Step 2: generating new resource request information and sending the new resource request information to the base station
And if the vehicle terminal judges that the SPS resource needs to be used for transmitting the burst information according to the current situation, generating new resource request information, sending a request to the base station, and requesting the base station to temporarily allocate the SPS resource for transmitting the burst information. The specific judging step comprises the following steps:
step 21, judging whether the conventional scheduling mechanism meets the time delay requirement
If the time delay of the acquired resources meets the transmission requirement of the burst information by adopting a conventional scheduling mode, the vehicle adopts a conventional scheduling mechanism to transmit, and the process is ended; and if not, entering the next step, and continuously judging whether the SPS resource is occupied to meet the requirement.
The vehicles use a conventional scheduling mechanism for transmission, wherein the conventional scheduling mechanism can transmit by sending a Scheduling Request (SR) to acquire resources within the coverage range of the network.
Step 22, determining whether the SPS resources meet the requirements
When the conventional scheduling mechanism cannot meet the time delay, the vehicle terminal can transmit the burst information by using the method of preempting the SPS resources, so that whether the preempted SPS resources can meet the time delay requirement or not needs to be further judged.
If the burst information needs to be occupied, the SPS resources originally pre-allocated to complete conventional information transmission can meet the transmission delay requirement of the burst information, and meanwhile, the amount of the pre-allocated SPS resources is greater than or equal to the amount of resources required by the burst information (i.e., resources required for transmitting part or all of the burst information and request information), the burst information can be transmitted by using a specific burst data packet, and the process goes to step 23 to generate SPS resource request information; otherwise, the transmission is carried out by adopting a normal scheduling mode.
Step 23, generating new resource request information
As shown in fig. 6, the vehicle terminal generates new resource request information (Special-MSG-a) after generating the burst information.
The format of the new resource request information is shown in fig. 7. Compared with the conventional information format, the new resource request information comprises the following added fields:
wherein, the data type label field uses 1 byte or 2 bytes to indicate the data type of the transmission. This field is 1 byte, and for example, regular information is indicated by 0, and Special-MSG-A information or Special-MSG-B information is indicated by 1. If the field is 2 bytes, the regular information may be represented by 00, the Special-MSG-a information by 01, the Special-MSG-B information by 10, and 11 as reserved bits.
A burst information data Coding format field, which is used to ensure successful transmission of burst data when transmitting Special-MSG-a and/or Special-MSG-B, and adjust mcs (modulation and Coding scheme) Coding format, such as repetition Coding, etc.
And a time-frequency resource amount field for requesting resources required for the burst information, such as time-frequency resources. If the data type is conventional information, the option is selected; if the data type is Special-MSG-A or Special-MSG-B, it is the necessary option.
And the resource grant mode field is used for indicating a mode of requesting resources, including an SPS mode or an SR mode, and has a length of 1 byte. For example, the field indicates the scheduling scheme (SR scheme) by 0 and the SPS scheme by 1.
The data transmission characteristic of the burst information is used for indicating the data transmission frequency or period or other regularity characteristics of the burst information, and if the value of the burst information data request resource grant mode field is 1, namely the SPS mode is requested, the information is a necessary option. For example, the user gives a cycle time of 10ms for continuous transmission of data.
Step 24, sending the new resource request information to the base station
As shown in fig. 6, the vehicle terminal uses a specific burst packet, i.e. new resource request information, to send a burst message on an upcoming SPS resource allocated to regular information, and discards the original regular information with a lower priority that should be originally transmitted on the SPS resource. In other words, a new data packet is transmitted on the reserved SPS resources for transmitting the regular information as new resource request information.
As mentioned above, the data packet includes part or all of the burst information data, and also includes a burst information time-frequency resource amount field or a resource grant mode field, etc. for indicating the related information of the requested SPS new resource, which is used for the base station to perform SPS new resource allocation.
And step 3: and the base station processes the new resource request information and allocates new resources for the burst information.
As shown in fig. 4, the base station receives the new resource request information sent by the vehicle terminal, and allocates corresponding resources to the burst information according to the own resource information and the new resource request information carried by the Special-MSG (for example, in fig. 7, 4 RB resources are needed in a burst information time-frequency resource amount field of the new resource request information, and a data transmission period is 10 ms).
If SPS resources are configured for the burst information, the resource configuration process can be realized by configuring MAC layer logical channel identifiers and the like.
And 4, step 4: and the vehicle terminal transmits the burst data packet by adopting the new resource.
The vehicle terminal transmits the burst information on the resource allocated by the network, the transmission period is 10ms (as shown in fig. 6), and the process is ended.
Also shown in fig. 6 is that the vehicle terminal simultaneously transmits the regular information using SPS resources reserved for the regular information, with a period of 50 ms.
< second embodiment >
As an alternative: if the reserved SPS resource for transmitting the conventional information is utilized, the resource request information carrying the burst information can meet the transmission delay of the burst information, and meanwhile, the reserved SPS resource has a resource capable of carrying the resource request (for example, the padding bits of the conventional information are enough to carry the resource request information), the conventional information can carry the resource request and send the resource request to the network side.
The difference from the first embodiment will be specifically described below with reference to fig. 8 to 10.
Step 22A, determining whether the SPS resources meet the requirements
As shown in fig. 8, in this embodiment, when the vehicle terminal determines that the SPS resource pre-allocated to the regular information transmits the regular information, the redundant bit of the SPS resource is sufficient to carry the burst information resource request, and meanwhile, whether the delay requirement is met.
And if the time delay requirement is not met or the redundant bits do not carry the burst information resource request, transmitting by adopting a conventional scheduling mode.
If the information meets the requirement, new resource request information Special-MSG-B is adopted to send to the base station on the SPS resource distributed to the conventional information.
Step 23, generating new resource request information
The new resource request information Special-MSG-B of the present embodiment is different from the new resource request information of the first embodiment in the following aspects:
1. as shown in FIG. 9, the vehicle terminal transmits Special-MSG-B on SPS resource of the incoming regular message, which has the same format as the regular message, but the redundant bits (reserved bits or filling bits) carry information requesting new resource for the burst message
2. As shown in fig. 10, the Special-MSG-B includes information requesting new resources for burst information, as well as general information.
When the burst information is generated, the original conventional information is transmitted by adopting Special-MSG-B grouping, the reserved bit or the filling bit of the SPS resource which is pre-distributed is carried by the vehicle terminal as the information of the burst information request new resource, the original reserved bit or filling bit is reduced, the time delay can be reduced, and the resource utilization rate can be improved.
The vehicle terminal transmits the burst information on the resource allocated by the network, the transmission cycle is 10ms (as shown in fig. 9), and the process is ended.
Also shown in fig. 9 is that the vehicle terminal simultaneously transmits the regular information using SPS resources reserved for the regular information, with a period of 50 ms.
It should be noted that the alternative in the second embodiment can be used alone as a modification, or can be combined with the scheme in the first embodiment as a new modification according to the network configuration.
The invention judges whether the new resource can meet the time delay requirement of the burst information or not by the vehicle terminal, and the new resource request information sent by the vehicle terminal to the base station also comprises the information required by the transmission of the burst information, such as time-frequency resource amount (namely the resource required to be provided by the base station) and transmission period, so that the vehicle terminal and the base station negotiate about the transmission of the burst information, and adopt a two-rail transmission mode of transmitting the burst information by the new resource and transmitting the conventional information by the reserved resource under the condition that the two judge meet the time delay requirement and the resource requirement, thereby realizing the rapid transmission of the burst information without occupying additional resources.
Compared with the prior art, the invention has the following advantages:
(1) quickly completing transmission of burst safety information
The low priority CAM information and the high priority DENM information are transmitted using different logical channels. This means that it is difficult for DENM information of higher priority to preempt CAM information of lower priority. At the same time, there may be multiple SPS resources for different DENM information transmissions. The period of DENM information is under 100 ms. Under the condition, if the present invention is adopted, the available period of DENM is mainly {20, 50,100} ms, and the probability that the three SPS resources are currently in an idle state is 1/2 and are not related to each other when the emergency burst safety message is generated, assuming that DENM information for generating three different periods is subject to uniform distribution, and the eNB configures SPS resources for the DENM information. Meanwhile, since DENM information is assumed to be uniformly distributed, the transmission probability of each kind of information is 1/3. Therefore, if the existing scheduling request is taken as a reference, the existing scheduling request is 17ms, and when the requirement of the transmission information on the time delay is less than 17ms, even if the condition that the known safety information of three different periods is transmitted simultaneously or partially simultaneously is not considered, compared with a mechanism for acquiring and transmitting resources in a scheduling mode, the probability of completing the information transmission in advance by using the existing period still reaches the probability
This will greatly reduce the transmission waiting time delay of the burst information, and further shorten the transmission time delay of the burst information.
(2) Improving transmission reliability of burst packet information
If the system adopts a resource random selection mode to acquire the resource for sending the burst information because of untimely scheduling, under the condition, the transmission reliability of the burst packet information can be reduced because the resource use conflict exists in the random resource selection mode; by adopting the invention, resource conflict can not occur, and the transmission reliability can be ensured.
(3) Improve the utilization rate of resources
If the original conventional information is transmitted by adopting Special-MSG-B grouping when the burst information is generated, the system uses the reserved bit or the filling bit of the pre-allocated SPS resource to carry the information of requesting new resources for the burst information, reduces the original reserved bit or filling bit, can reduce the time delay and improve the resource utilization rate.
It will be appreciated by those skilled in the art that a lesser degree of unfair transmission may be acceptable to ensure safe information transmission in the event of an emergency.
In addition, the invention also provides a vehicle terminal and a base station for realizing the vehicle networking information accelerated transmission method, which respectively realize corresponding steps or functions in the method.
When the vehicle terminal can meet the time delay requirement by using new resources, new resource request information is generated and is sent to a base station through resources pre-allocated to conventional information; the new resource request message includes a burst message time-frequency resource demand field.
The base station receives new resource request information from a vehicle terminal through resources pre-allocated to conventional information, and allocates new resources to the burst information according to the resource request information, wherein the new resource request information comprises a burst information time-frequency resource demand field.
The new resource request information further includes a data transmission period field, a data type tag field, a resource grant mode field, a data encoding mode field, or a data propagation characteristic field.
The aforementioned new resource request information also includes part/all of burst information, or regular information.
The method for transmitting the vehicle networking acceleration information, the vehicle terminal and the base station provided by the invention are described in detail above. Any obvious modifications to the invention, which would occur to those skilled in the art, without departing from the true spirit of the invention, would constitute a violation of the patent rights of the invention and would carry a corresponding legal responsibility.
Claims (9)
1. A vehicle networking information accelerated transmission method is characterized by comprising the following steps:
step 1: the vehicle terminal generates burst information and judges whether a conventional scheduling mode meets the time delay requirement or not; if the requirement is met, the burst information is transmitted by adopting a conventional scheduling mode, and if the requirement is not met, whether the preempted SPS resources can meet the time delay requirement is further judged; if the pre-allocated SPS resources are preempted by the burst information and the transmission delay requirement of the burst information can be met, and meanwhile, the pre-allocated SPS resources are more than or equal to the resource quantity required by the burst information, the burst information is transmitted by adopting a burst data packet; otherwise, transmitting the burst information by adopting a conventional scheduling mode;
step 2: the vehicle terminal generates new resource request information and sends the new resource request information to the base station, wherein the new resource request information comprises one or more of a burst information time-frequency resource demand field, a data transmission period field, a data type label field and a resource granting mode field; the new resource request information is sent to the base station on the SPS resource reserved for sending the conventional information, and the conventional information originally transmitted on the SPS resource is discarded;
and step 3: the base station processes the new resource request information and allocates new resources for the burst information;
and 4, step 4: the vehicle terminal sends the burst data packet by adopting the new resource; and sending the new resource request information to the base station through the resources pre-allocated to the conventional information.
2. The internet-of-vehicle information accelerated transmission method of claim 1, characterized in that:
and the vehicle terminal sends the burst data packet by adopting the new resource and simultaneously sends the conventional information by adopting the resource pre-allocated to the conventional information.
3. The internet-of-vehicle information accelerated transmission method of claim 1, characterized in that:
the vehicle terminal judges whether redundant bits of SPS resources pre-allocated to the conventional information are enough to carry a burst information resource request or not when the conventional information is transmitted by the SPS resources, and whether the time delay requirement is met or not;
if the time delay requirement is not met or the redundant bits do not carry the burst information resource request, the transmission is carried out by adopting a conventional scheduling mode; and if so, sending the new resource request information to the base station on the SPS resources allocated to the conventional information.
4. The Internet of vehicles information accelerated transmission method according to claim 2 or 3, characterized in that:
the vehicle terminal judges whether the new resources are utilized to meet the time delay requirement or not; and if the requirement is met, the new resource is utilized to transmit the burst information, and if the requirement is not met, the conventional scheduling mode is utilized to transmit the burst information.
5. The Internet of vehicles information accelerated transmission method of claim 4, characterized in that:
whether the new resources meet the delay requirement or not, and whether the new resources have part or all of the burst information and the resources required by the request information.
6. The internet-of-vehicle information accelerated transmission method of claim 1, characterized in that:
the new resource request information further includes a data encoding mode field or a data propagation characteristic field.
7. The Internet of vehicles information accelerated transmission method according to claim 1 or 6, characterized in that:
the new resource request information also includes partial/full burst information.
8. A vehicle terminal for implementing the car networking information accelerated transmission method of claim 1, characterized in that:
when the vehicle terminal can meet the time delay requirement by using the new resource, generating new resource request information, and sending the new resource request information to the base station through the resource pre-allocated to the conventional information;
the new resource request information comprises one or more of a burst information time-frequency resource demand field, a data transmission period field, a data type label field and a resource granting mode field.
9. A base station for implementing the car networking information accelerated transmission method of claim 1, characterized in that:
the base station receives new resource request information from the vehicle terminal through the resources pre-allocated to the conventional information;
the base station allocates new resources for the burst information according to the new resource request information;
the new resource request information comprises one or more of a burst information time-frequency resource demand field, a data transmission period field, a data type label field and a resource granting mode field.
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| CN108810076A (en) * | 2018-04-12 | 2018-11-13 | 中国科学院上海微系统与信息技术研究所 | Car networking accelerates the optimization method of information transmission |
| US11405932B2 (en) | 2018-08-08 | 2022-08-02 | Hannibal Ip Llc | Method and apparatus for power control of wireless communications |
| CN108990014A (en) * | 2018-09-04 | 2018-12-11 | 西安交通工程学院 | A kind of car networking method for message transmission based on LTE-V |
| CN111462516A (en) * | 2020-04-13 | 2020-07-28 | 大唐信通(浙江)科技有限公司 | Beyond visual range information transmission system combining wireless communication with external display screen |
| CN111785019B (en) * | 2020-06-22 | 2022-08-16 | 北京千方科技股份有限公司 | Vehicle traffic data generation method and system based on V2X and storage medium |
| CN113038389B (en) * | 2021-05-27 | 2021-08-06 | 睿至科技集团有限公司 | Method and system for realizing data interaction based on Internet of vehicles |
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| US9906347B2 (en) * | 2015-04-09 | 2018-02-27 | Samsung Electronics Co, Ltd | Method and system for hybrid automatic repeat request operation in a semi-persistent scheduling (SPS) interval |
| CN106211331A (en) * | 2015-05-05 | 2016-12-07 | 中兴通讯股份有限公司 | The method and apparatus of resource distribution |
| CN106559877B (en) * | 2015-09-24 | 2019-02-26 | 中兴通讯股份有限公司 | The sending method and device of car networking business, resource allocation method and device |
| CN105681439A (en) * | 2016-01-29 | 2016-06-15 | 宇龙计算机通信科技(深圳)有限公司 | Resource scheduling method and device used for vehicle communication, terminal and base station |
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